It's for all those times when the art snobbery of a piece reaches such high levels that the feeble attempts made at being "exotic" or "ground breaking" just lands the artist squarely in the realm of retardation.
"I went to this new art gallery last week but it was so Avant Tard that it hurt!"
by Alienswede September 4, 2006
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Cutting edge retard. Similar to avant guard, meaning cutting edge or ahead of its time, yet retarded.
Corky's performance in episode #12 of 'Life Goes On' was sooooo Avant Tard!
by Jenn Dickey December 17, 2005
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The attempt to pull off something as edgy, experimental and cool but fails.
by Taryn R April 7, 2008
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Hipsters who think they are cool, new and fresh, and have missed the irony in their retardedness.

The leading edge of edgy hipsters who have their heads so far up their arseholes with not an ounce of cool or self-awareness to allow them to realise that they are not in any way shape or form presenting anything new in their style, action, diction or modus operandi.
1) That guy, Don Atari, is so avant-garde. (adjective)

2) My sister is one of the avant-tarde. (noun)
by Tokyo_Spy May 23, 2017
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